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    <!-- 1）计算下列算式，并将结果输出： -->
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<script>
    // 123+45*78
     var aa = 45 * 78 + 123
    //  console.log(aa);
    //  34+543
     var bb = 34+543
    //  console.log(bb);
    //  123+45*78 / 34+543
     var cc = parseInt(aa / bb)
    //  console.log(cc);
    //  324-34
     var dd = 324-34
    //  console.log(dd);
    //  9(324-34)
     var ee = 9 * dd
    //  console.log(ee);
    //  cc - ee
     var he = cc-ee
     console.log(he);
</script>